# Transparency Harm Reduction vs DrugsPRO Guide

The clearest difference is rating: DrugsPRO Guide at 5.0 against Transparency Harm Reduction's 3.7. DrugsPRO Guide also leads on update cadence (weekly vs every 3 weeks) and device support (4 vs 1). Transparency Harm Reduction's advantage is in-app purchases (none vs 3) and ratings volume (6 vs 1). On price, ads and iOS requirement there is nothing between them.

Both are free to download. DrugsPRO Guide sells 3 in-app purchases, starting at $0.99 per month. Transparency Harm Reduction asks for nothing beyond the download.

DrugsPRO Guide holds the better App Store score, 5.0 against 3.7. That said, the two scores are not equally well evidenced: Transparency Harm Reduction has 6 ratings behind it against 1, so its average is the more settled of the two.

Transparency Harm Reduction ships an update every 3 weeks, DrugsPRO Guide weekly. The most recent releases landed on November 4, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Transparency Harm Reduction | DrugsPRO Guide |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.7 (6 ratings)](https://appshunter.io/ios/app/transparency-harm-reduction/id6504291757/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/drugspro-guide/id6758899429/reviews)** |
| Number of ratings | **6** | 1 |
| Positive reviews | 60.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Weekly** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 3 MB | 38 MB |
| Requires iOS | **17.0** | 17.6 |
| Devices | iPhone | **iPhone, iPad, Mac, Apple Watch** |
| Age rating | 17+ | 17+ |
| Developer | [Infinite Transparency](https://appshunter.io/developer/1751743572) | [Chemical Safety sp. z o.o.](https://appshunter.io/developer/1875610240) |

## What reviewers say

### Transparency Harm Reduction

[App page](https://appshunter.io/ios/app/transparency-harm-reduction/id6504291757)

This AI-powered app offers immediate guidance for substance testing, featuring a database of reaction videos and advice on kit usage. It aims to make substance testing accessible and easy with expert-backed information.

**Highlights:** AI-powered substance testing guidance, Database of over 1,100 lab-verified reaction videos, Instructions on how to test substances, Test kit recommendations, Access to testing guides and help, Direct links to purchase test kits

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### DrugsPRO Guide

[App page](https://appshunter.io/ios/app/drugspro-guide/id6758899429)

This app provides comprehensive information on psychoactive substances, including effects, risks, and interactions. It offers tools for journaling, drug checking, and interpreting test kit results to promote safer, informed choices.

**Highlights:** Psychoactive substance library, Drug interaction engine, Substance journaling, Drug checking warnings, Test kit analysis tools, Offline functionality

**Features:** Apple Watch app

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| DrugsPRO LiveActivity Monthly | $0.99 | per month |
| DrugsPRO LiveActivity Yearly | $3.99 | per year |
| DrugsPRO LiveActivity Lifetime | $8.99 | one-time |


## Frequently asked questions

### Is Transparency Harm Reduction free?

Transparency Harm Reduction is free to download, with no in-app purchases.

### Is DrugsPRO Guide free?

DrugsPRO Guide is free to download, with in-app purchases available.

### Which has better reviews, Transparency Harm Reduction or DrugsPRO Guide?

DrugsPRO Guide is rated higher. Transparency Harm Reduction averages 3.7 out of 5 from 6 ratings, while DrugsPRO Guide averages 5.0 from 1 ratings.

### Do Transparency Harm Reduction or DrugsPRO Guide have ads?

Neither Transparency Harm Reduction nor DrugsPRO Guide shows ads.

### Which is updated more often, Transparency Harm Reduction or DrugsPRO Guide?

Transparency Harm Reduction ships an update every 3 weeks, and DrugsPRO Guide weekly. Most recently, Transparency Harm Reduction was updated on November 4, 2026 and DrugsPRO Guide on November 5, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*